Import getpass from getpass, instead of using getpass.getpass everytime.

examples/muc.py

@@ -10,7 +10,7 @@
 """
 
 import logging
-import getpass
+from getpass import getpass
 from optparse import OptionParser
 
 import slixmpp
@@ -153,7 +153,7 @@ if __name__ == '__main__':
     if opts.jid is None:
         opts.jid = input("Username: ")
     if opts.password is None:
-        opts.password = getpass.getpass("Password: ")
+        opts.password = getpass("Password: ")
     if opts.room is None:
         opts.room = input("MUC room: ")
     if opts.nick is None: